International holidays - World Hydrography Day
Celebrated on 21 JuneInternational holidays - World Hydrography Day
Other holidays on 21 June
- UN Holidays - International Yoga Day
- UN Holidays - International Day of the Celebration of the Solstice
- International holidays - International Skateboarding Day (Go Skateboarding Day)
- Russian holidays - Cynologist Day (Day of canine units of the Ministry of Internal Affairs of the Russian Federation)
- Pagan holidays - Litha - summer solstice (Litha)
- Fun Holidays - Selfie Day
- International holidays - World Giraffe Day
- Holidays of the Slavs - The Birth of Vyshnya-Perun
- International holidays - Summer Solstice
- Holidays of Russia - Yakut New Year “Ysyakh”
- International holidays - World Humanist Day
- Canadian Holidays - National Aboriginal Day
- Funny holidays - International Flower Day
- French Holidays - Music Day (Fete de la Musique)
- According to the folk calendar - Fedor Kolodeznik
- Feast of the Uryupinsk Icon of the Mother of God
- Feast of the Yaroslavl Icon of the Mother of God
- Memorial Day of St. Theodore, Bishop of Rostov and Suzdal